Report on the Analysis of Potable Waters of Cantonments in the Bengal Presidency (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1869 Excerpt: ...in this than in the tank water; the amount of chlorides has been slightly in excess, and that of nitrates has steadily increased even while it was decreasing in the tank; this is probably, in part at least, due to the fact that no confervoid matter, such as was found in the tank, would be developed in the darkness of the well to consume the nitrates as they were formed. This well appears to have fallen into disuse, notwithstanding the superior quality of its water. The increase which was found to have occurred in the proportion of total solids, hardness, chlorides, and possibly also in nitrates, was due to solution of parts of the well walls bv lon- continued contact. The tank in the Lieutenant-Goveror s compound was used by the troops when the parade-ground tank and that in the old school compound became quite dry; its water, though not of good quality on the date of analysis (March 21st), was found to be superior to any in Alipore, except that of the well above referred to. The tank to the east of the Lieutenant-Governor-s compound was not examined till the water had nearly been all used or dried up, at which time (May 21st) it could only be considered as of the foulest description. Fort William.--The Fort has been constantly supplied with water from several sources, all of which were exceedingly foul, but owing to the excellence of the nitration which takes place before distribution, the water actually used was of fairly good quality, as will be seen by a reference to the three analyses made of water taken from one of the hydrants. On one occasion this water contained the unusually large proportion of 134 parts of chloride of sodium per million; this happened near the end of May, when, owing to the decrease in the downward flow of water in the river...